Sawing-machine guard



H. C. VOSS AND C. HULTGREN.

SEWING MACHINE GUARD.

APPLICATION FILED NOV-5,1917- 1 368,,773B

2 SHEETS-SHEET I- Patented Feb. 15, I921.

H. C. VOSS AND C. HULTGREN.

'SEWING MACHINE GUARD.

APPLICATION FILED Nov. 5, 1917.

136,773., Patented Feb. 15, 1921.

2 SHEEIS-SHEET 2.

4. 7% @672 z aKS PATNT @FFHQCE.

HENRY C. VOSS AND CHARLES HULTGBEN, 01 CHICAGO, ILLINOIS, ASSIGNORS ToS. KARPEN & BS, OF CHICAGO, IL GINIA.

LINQIS, A CORPORATION OF WEST VIR- SAWING-MACHINE GUARD.

Specification of To all whom it may concern:

Be it known that we, HENRY C. Voss and CHARLES HULTGREN, citizens of theUnited States, residing at Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Improvement in Sawing- MachineGuards, of which the following is a specification.

This invention relates particularly to guards for power-operated saws;and the primary object of the invention isto provide a sawing-machinewith a. guard, preferably in the form of a self-adjusting screen,adapted to play over the stock or board, as it is fed to the saw andserving to catch or arrest any splinters or fragments of stock which maybe hurled or projected violently by the saw toward the operator.

The invention is illustrated, in its "preferred embodiment, in theaccompanying drawings in which- Figure 1 represents a broken sideelevational view of a sawing machine equipped with the improved guarddevice; Fig. 2, a broken vertical sectional view taken as inclicated atline 2 of Fig. 1; and Fig. 3 an upper rear perspective View of theimproved guard or screen.

The drawings represent a sawing-machine of well-known construction,comprising a bed A supported on a standard A and equipped with mechanismA adapted to feed the stock or board to the saw; a rotary saw B havingan arbor B journaled in the frame above the bed and actuated by anysuitable power (not shown); a front pair of rolleis C and a rear pair ofrollers C co-acting with the bed and feeding mechanism to hold and feedthe stock or board in its passage through the machine; a spring-heldpivotally-mounted pressure-board D equipped with a serrated roller Dadapted to roll on the severed strip of board; a gage or guide Itsupported on the bed A and extending longitudinally thereof at one sideof the path of the board I and a hood Gr disposed over the front roll orrolls and having connected therewith a pipe or conduit G whichcommunicates with any suitable suction device not shown).

H designates the improved guard or attaclunont, which is applied to astationary member of the machine, being mounted preferably upon thefront side of the hood I plate 3 equipped at its ends Lett r PatentPatented Feb. ll5, 192i.

Serial No. 200,315.

The device H, in. the referred form which is illustrated, comprises abracket 1 of angular from, and having a transversely disposed arm 1adjustably secured to the hood G, and an arm 1 extending longitudinallyof the machine and equipped at its front end with atransversely-extending pivot-member or shaft 1 which is rigidly securedto the arm 1"; a series of inclined gravity fingers, or narrow bars 2,having an inclination rearwardly and downwardly, the upper front ends ofsaid bars being pivotally mounted on the shaft 1 and the lower endsthereof being adapted to play upon or about the stock or board F as itis fed over the bed to the saw; and a fixedly-secured rearwardly andupwardly-extending guardwith arms 3 which are provided with bosses 3fitted upon and fixedly secured to the shaft 1.

The fingers, or pawl-like bars 2, are preferably about one-eighth of aninch thick and of sufficient depth to give the requisite strength. Thepivot 1 is disposed several inches above the bed and several inches infront of the hood G and the fingers 2 are preferably of such length asto form an angle of in the neighborhood of 45 with the bed. In anyevent, it is desirable that the fingers shall form quite an acute anglewith the bed; and it is also desirable that the lower extremities of thefingers shall be beveled, as shown in Fig. 1, so that any splinters orfragments of the board will pass or ride readily over the upper surfacesor edges of the fingers and be arrested by the fixed guard-plate 3,which may form an angle of approximately 90 with the plane .of thefingers.

The position of the fingers, or their inclination may vary, dependingupon the thickness of the stock. and depending upon the width of thestock. Preferably the fingers, or narrow bars 2, are placed side by sideand the outer pivoted ends confined between the bosses 3 of the fixedarms 3*. The lower ends of the fingers will play upon and about theboard F as it is fed through the machine. It is desirable that thescreen comprising the fingers 2 shall be of a width somewhatgreater thanthe width of the endless feed device A one link of which is shown insection in Fig. 2. In Fig. l, the board happens to be narrow enough sothat one or more of the fingers will drop down and rest upon thebed-plate adjacent the edge of the board, while the majority of thefingers will play upon the top surface of the board.

The arm 1 of the bracket 1 is shown provided with an elongated slot,through which extends a cap-screw or bolt 4, which serves to secure thebracket firmly to the hood or stationary member G of the machine.

In the form of the machineshown, the feeding mechanism A comprises anendless conveyer or apron, composed of bar-form links 5, which have aserrated or grooved outer surface. These links are provided withlongitudinal groove: 5, into which the ipwer edge of the saw projects,as shown in In the operation of a machine of the character illustrated,the board A is fed through the machine in the direction indicated by thearrow, passing first beneath the guard H, then beneath the front rollersC, past the saw B and beneath the rear rollers C the feeding beingeffected by the endless conveyer A The saw rotates very rapidly in thedirection indicated by the arrow and operates either to cut a kerf inthe board or to split the board. Any splinters or frag ments of theboard which may be caught by the saw will be projected violently towardthe front end of the machine. It sometimes happens, to illustrate, thata very. narrow strip is being severed from the board, and this may breakor may be caught and gouged by the saw, which will project the stripviolently toward the front end of the machine. The guard device A serveseffectively to catch or arrest the splinters and elongatedprojectileswhich are sometimes formed in the operation of the machine,thus protecting the operator from injury.

The foregoing detailed description. has been given for 'clearness ofunderstanding only, and no unnecessary limitation should be understoodtherefrom, but the appended claims should be construed as broadly as ispermissible in View of the prior art.

What We regard as new and desire to secure by Letters Patent is- L. Anattachment of the character set forth, comprising a bracket having atone end an arm for attachment to a stationary part of a machine andhaving at the other end a pivot, a fixedly-secured guard-plateprojectlng from said pivot upwardly and in the direction of feed throughsaid attachment, and a series of thin fingers disposed closely adjacenteach other to provide a complete screen and mounted to turn freely onsaid pivot and adapted to rest at their free ends upon a bed beneathsaid arm, said fingers being normally inclined in the direction of feedthrough said attachment.

2. The combination with a machine comprising a saw and a bed equippedwith means for feeding stock to the saw, of a guard comprising a fixedlymounted bracket, a pivot carried by said bracket, a series of thinfingers mounted to turn freely on said pivot and disposed closelyadjacent each other to provide a complete screen, said fingers beingadapted to extend rearwardly and downwardly and play upon a board as itis fed to the saw, and an upwardly and rearwardly inclined guard-platefixedly mounted on said pivot and overhanging said screen, wherebysplinters deflected upwardly by said screen will be trapped under theoverhanging quai'dplate.

HENRY C. VOSS. CHARLES HULTGREN.

